﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * FCKEvents Class: used to handle events is a advanced way.
 */

var FCKEvents = function( eventsOwner )
{
    this.Owner = eventsOwner ;
    this._RegisteredEvents = new Object() ;
}

FCKEvents.prototype.AttachEvent = function( eventName, functionPointer )
{
    var aTargets ;

    if ( !( aTargets = this._RegisteredEvents[ eventName ] ) )
        this._RegisteredEvents[ eventName ] = [ functionPointer ] ;
    else
    {
        // Check that the event handler isn't already registered with the same listener
        // It doesn't detect function pointers belonging to an object (at least in Gecko)
        if ( aTargets.IndexOf( functionPointer ) == -1 )
            aTargets.push( functionPointer ) ;
    }
}

FCKEvents.prototype.FireEvent = function( eventName, params )
{
    var bReturnValue = true ;

    var oCalls = this._RegisteredEvents[ eventName ] ;

    if ( oCalls )
    {
        for ( var i = 0 ; i < oCalls.length ; i++ )
        {
            try
            {
                bReturnValue = ( oCalls[ i ]( this.Owner, params ) && bReturnValue ) ;
            }
            catch(e)
            {
                // Ignore the following error. It may happen if pointing to a
                // script not anymore available (#934):
                // -2146823277 = Can't execute code from a freed script
                if ( e.number != -2146823277 )
                    throw e ;
            }
        }
    }

    return bReturnValue ;
}
